Material-cutter.



H. ZIMMERMAN.

MATERIAL CUTTER. APPLIATIO'N FILED SBPT.17,1907.

Patented Aug. 24, 1909.

2 SHEETS-SHEET l.

H. ZIMMERMAN.

MA'IERIAL GUTTER.

APPLIATIoN FILED.SBPT.17, 1907.

Patented Aug. 24. 1909.

2 SHEETS-SHEET 2.

.E 'NSQ E, M ATToRNEY feo Unrrnn STATES Parenti Frio HARRY zrnnnnnAN, orrnnn'onr, onto.

' MATERIAL-Curran, 1

i which the following isa specification. 'This invention relates tocutting material, and more particularly to prolonging the usefulness'ofthe cutting element las Well as so congnring the elements that they mayVbe readilyfreed from the material while they are permitted to so acttogether as-to bring aboutthe most economical cutting by reducing thewaste.

This invention has utility Vwhen embodied .indios for'cutting fabrics,especially a plurality of thicknesses ofifabric at once, asit will notonly directly penetrate the goods, but is easily Withdrawn, excessivecongestion lbeing avoided. Whatever binding occurs is within the dieand-therein is so disposed as to minimize strains on weaker portions ofthe die, as the angles. Furthermore this inwardly directing wedge actionof the cutter takes ,places only where the series of cutters 'abut jornearly abut each other, thus preventing the cuttersv from workingagainst eachother. The result of this. is that .the cutters tend to seekeach other and thus automatleally bring about the most advanteh geouscutting by eliminating to the greatest degree possible intermediatewaste This lineofaction is so close that not" even a ting portions ofthe dies. -V

Referring to the drawings: Figure perspective view of thev embodiment ofthe vinvention in an endless die; Fig. 2 isa plan View of a group ofdies; Fig. 8 is alongitudidie ,shown in 5, illustrating its action onthematerialto be'cut; and Fig. 7 is a Speocatn of Letters Patent.

Application led September 17, .1907. Serial No. 393,341.

portion ofthestiening wall.

thread of fabric remains betweenthe abut-l lis-a nal section 'of one ofthe dies on line III-III Fig. 2; Fig. 4' .is a Vtransverse section ofthe dies on line IlV-IV Fig. 2; Fig.v 5 is a' bottom: plan view of oneofthe dies `shownvin Fig. 2; Figf is a longitudinal section of --fviewin usection similar to line IVIV Fig. n j- 2:.e`xtended to include aportion of third die, i, a}so illustrating action of the dies on the ingthe Waste to a minimum., lith dies of form illustrated, anarrangement'longitudinally parallel'as shown in Fig. 2 most nearly usesall of the goods. lVith this arrange nient 4accordingly Vthere shouldnot be a Wedge action between the dies to push'thein away from eachother as they penetrate the goods, and 'the longitudinally extendingwalls have the incline or bevelto congest the goods in the die in theintermediate portions No ill; effects follow from this thereof. bindingas it does not become excessive, the terminal portions -of the diehaving freeing 'wallsf At one terminal the wall 4 is between thereversely extending walls 5, 6; while at the remote end, wall 7 connectswalls 8, 9, which extend in reverse directions. These portions 4, 7, notadjacent the walls of the dies Withwhich the grouping is to be had,Aflare or have the bevel on the outer side, the inner side being nearlyperpendicular to the entering edge, or there may be a slight inolineoutwardly to still further free the fabric cut, thus thrdwingloiverportion l0 of `Wall 4 wit-hin the length of the top of the die.

From' the position of the entering edge` adjacent the inner side of thestiffening wall at portion 10,-theentering edge in following the'fori'nl`of thedie crossesgrelatively to the stiffening wall at edges ll, l2 totheouter Likewise, edge 13 underthe wall portion 7 vis near the inner-side of die wall and connected by edges .14, l5, to the longitudinalruns of edge 2 which are adjacent the outer edge of the stiffening wall3. The configuration of the stiffening Wall is thus different from thatof the cutting. edge, the wall Haring outward at those points exteriorto the Grouping of the i material cutters. The dies ar of the regularform as to action line of cutting edge, but the stifening Wall isstaggered relatively thereto.

Werel the bevel continued directly down the stiffening wall on one sideonly to render sharp enough for a cutting'edge, this would,

lcause action of the material through which the cutter operated to actall against one (the beveled) side ofthe wall, the lower portion ofwhich must be so thin that in heavy work lturning or fracture wouldfollow. To insure against' this trouble, in dressing the entering edge,it isgiven a very short counter bevel `l6 of such angle that the edgehas strength to withstand `Work of cutting, but soshort that abuttingdiesV by wedge action on the Patented aug. ai, i909..

inner sidesof the adjacent walls hold the dies so closely in contactthat a thread may not be left therebetween. As there is no intermediatecongestion, there is no forcing of the dies apart as they are forcedintothe material. In reality', they Work toward each other.

In the group cutting, a plurality of dies are arranged in such manner asto cut to the greatest advantage, the dies'being provided with brackets17 which loosely engage rods 18. The rods 18 with end bars 19 constituteaframe for the grouping of the dies.v In operation, an end die is set atthe proper.

point near the edge of the plurality of thicknesses of superposedmaterial, and the remaining dies yare slid along to iit againsteachother from the end die. As power is applied, the" parallel abuttingwalls, as shown in Fig. 4:, tend to Work with each other, automaticallymaintaining the most economical cutting relation While mutuallystaggered over, transferring the Wedgmg action-outside of the die tothrust the material away from the set or grouping (see Fig-3). In theembodiment shown, this change o'f wedge or Haring is about the terminalsand besides freeing the material coming into the die near the ends, is afeature of increased strength for the' die as the Wedging is now againstthe outer or convex portion ofthe die instead of the inner or concave.

The action against the convex side of the wedge,

* brings the reversal portions of the end walls to mutually coact. inwithstanding Vthe strain, While if the outer side were straight and theinner part of the end beveled there would be no wedging or resistance onthe outer side of the wall, while Wedgin on inner side would tend toforce'all asun er.

The grouping of the dies without rigid confinement, imparts suchflexibility to the system that unequal resistance is not liable toinjure the Whole set, while if one should meet with accident, it may bemore cheaply replaced than if a unit, while thev result is as a u nitmultiple form die so far as economizmg material 1s concerned forinasmuch as between, better results could not be obtained.

The invention, :besides bringing about maximum economy in cutting,permits of most ready freeing from the material, -as

well as produces a cutter of great strength, and therefore, of longlife. The -freeing from intermediate material' is due to the parallelouter' walls between the dies, so giving no binding action. In addition,the

loose assemblage of the group enables them`- .to easily space from,ea-ch other when with# drawn, and all the outside material at oncefalls away. The cut pieces, having the regular form of the cutting edgefor the particular form desired, are uncompressed or free in onedirection, which with the die shown is the longer way, while intheopposite or'transverse direction the pieces are somewhat compressed.lVith thin material, as'cloth, which may be piled up to two orthree-inches of thicknesses, the severalpieces 'as they are cut inmultiple and as they move up between the wedge faces tend to bulge'medially, which is readily permitted owing Awhilethe adjacent die wallsare elfective medial reinforcing means.

The counter lead 16 of the cutting edge lui) i brings the -action partofV vthe die underv aconsiderable portion of the-stilfening Wall, makingit strong in resisting compression, while the contour of the edge issuch that in operation it will not tend to buckleor liex out of form.

The reversals at the terminals form interior angle having convexexterior Wedge Walls.

What i'sA claimed and it is desired lto secure by Letters Patent is:

`l. A dieh'aving a' peripheral entering edge and a stiening walltherefor having each side staggered relativelyto said entering edge. j

2. A material cutter having a peripheral stilfening wall with anentering edge staggered to opposite sides of the'medial line of thewall. v

3. A die having a peripheral entering edge in conguration'extending inreverse directions in a common plane, and a stiHening wall for -the edgeoppositely disposed to .the edge adjacent the reversals. where the edgesabut there is no material left 4. .A die having reversely extendingWalls, and a peripheral enteringedge in a common plane for the walloppositely disposed to the walls between the reversals.

5. A die forcutting material, having an entering'- edge. of' interiorleA f orm iipon an internal wall, `remotely fg om the angle v con esting.the material and locally .to the i cutting edge in a common planeandliaving aplralityof alternate exteriorly. adinterie A orlydirecting-.wedge'walls for the-'materialg -7. A- plurality ofrind'e'pendent abutting 'diesf-having entering'. edges and stiening ltion of the material tool-1e direction in ythe grouping of the dies'comprising a bar :on which theldies areslidably monnted.- Y

rality of mutually reinforcing material` cut.- ters inov'ably,engagedthereby.

10. A plairality of- (1Q-seeking rect-ing'tlie grouping of the'dies.

11.- A material freeing 'combination "of .dies ywith Wedge Walls'directing theV unconinedmaterialfawayfromthe line of-thee01nb`in2-ztio1-1 and'oppositely directing" the In testimonyWhereoflax signature in tliepresence 'of two' Witnesses. j HARRYZIMMERMAN.. VVit-nessesz.v GEO. E. KIRK, l

. 'MARIE KLOPFER.

. e dies land- ,relatively m0vable'-1neans` foi'yleldably 'di-

